Isoetes butleri

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Taxonavigation: Isoetales 

Superregnum: Eukaryota
Regnum: Plantae
Divisio: Tracheophyta
Divisio: Lycopodiophyta
Classis: Isoetopsida
Ordo: Isoetales

Familia: Isoetaceae
Genus: Isoetes
Species: Isoetes butleri


Isoetes butleri Engelm., Bot. Gaz. 3: 1. 1878.

  • Syntypes:: Indian Territory, Limestone Gap on the Missouri, Kansas and Texas railroad, on alcaline flats. First week in June, 1875, 26.5.1877, 16.6.1877, 16.6.1877, G.D. Butler s.n. (MO, PH)


  • Homotypic
    • Calamaria butleri (Engelm.) Kuntze, Rev. Gen. Pl. 2: 828. 1891.
  • Heterotypic
    • Isoetes butleri var. immaculata Engelm., Trans. Acad. Sci. St. Louis 4: 388. 1882.
      • Typus: Tennessee, Cedar barrens near Lavergne [= Nashville], 7.5.1880, A. Gattinger (MO, US)
      • Isoetes butleri f. immaculata (Engelm.) Clute, Fern-Allies: 258. 1905.

Native distribution areas

Display the range areas:
  • Continental: Northern America
    • Regional: North-Central U.S.A.
      • Illinois, Kansas, Missouri, Oklahoma
    • Regional: South-Central U.S.A.
      • Texas
    • Regional: Southeastern U.S.A.
      • Alabama, Arkansas, Georgia, Kentucky, Tennessee

References: Brummitt, R.K. 2001. TDGW – World Geographical Scheme for Recording Plant Distributions, 2nd Edition